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The Clap For Our Carers event set an all-time record for internet traffic, Virgin Media has said.
More people were uploading videos of applause and other celebrations for NHS workers than at any time in the past, the network said.
The campaign saw people across the country urged to open their doors and windows and make as much noise as possible to celebrate healthworkers who are caring for those with Covid-19 .
Around 8pm, as the event began and households across the country put down devices to take part in the celebration , traffic sharply dipped, according to the network. Downstream traffic – where devices are receiving data – sharply fell as people left their houses.
But soon after that upstream traffic surged, presumably as people flocked to share the videos and photographs they had taken of the celebration.
Footage of the events spread quickly around social media as videos showed entire streets take part in the event, and celebrations from across the country.
Upstream traffic – data sent by people when using programmes such as video calls – has increased significantly during daytime hours, as the public stay at home during the coronavirus lockdown.
Virgin Media said upstream traffic on its network is up more than 150 per cent on the previous month, due to a rise in video conferencing and digital classrooms.
Over the past two weeks, data use on the Virgin Media network has risen gradually, with a "new normal" emerging as usage begins to level out, the company added.
Clap For Our Carers: People across UK thank the NHSShow all 32 1 /32Clap For Our Carers: People across UK thank the NHS Clap For Our Carers: People across UK thank the NHS People clap from a block of flats opposite St Thomas' Hospital in London. Briton's were encouraged to clap for carers at 8pm local time to celebrate employees of the NHS
EPA
Clap For Our Carers: People across UK thank the NHS Staff outside the St James's University Hospital in Leeds, wave to people applauding them from their balconies
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Clap For Our Carers: People across UK thank the NHS A sign by Wembley Park Tube Station in London that thanks the hardworking NHS staff
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Clap For Our Carers: People across UK thank the NHS Barbara Leigh, aged 93, (second left) rings a bell for the NHS, with her family who are all staying together throughout the lockdown, from their front garden across the road from Wythenshawe Hospital in Manchester
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Clap For Our Carers: People across UK thank the NHS NHS staff respond as people in Blackpool join in the national applause
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Clap For Our Carers: People across UK thank the NHS Prime Minister Boris Johnson and Chancellor of the Exchequer Rishi Sunak applaud outside 10 Downing Street
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Clap For Our Carers: People across UK thank the NHS Staff from the Royal Liverpool University Hospital join in a national applause
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Clap For Our Carers: People across UK thank the NHS Tyne Bridge lit up in blue to support the NHS
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Clap For Our Carers: People across UK thank the NHS Residents in a Northampton street applaud
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Clap For Our Carers: People across UK thank the NHS Princes George (right), Louis (centre) and Princess Charlotte joining in a national applause for the NHS as people across the country showed their appreciation for all NHS workers who are helping to fight the coronavirus
Duke and Duchess of Cambridge/PA
Clap For Our Carers: People across UK thank the NHS People in Woodford Green, London, join in a national applause
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Clap For Our Carers: People across UK thank the NHS People in flats wave the Scottish flag in Glasgow as they join in a national applause for the NHS
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Clap For Our Carers: People across UK thank the NHS Ventura', a Grand-class cruise ship of the P&O Cruises fleet, docked at Southampton Docks shows its support for the NHS by lighting up rooms on the cruise ship to spell '#I LOVE NHS'
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Clap For Our Carers: People across UK thank the NHS Staff from the Royal Liverpool University Hospital join in a national applause
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Clap For Our Carers: People across UK thank the NHS The SSE Hydro in Glasgow is lit up in blue in a gesture of thanks to the hardworking NHS staff
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Clap For Our Carers: People across UK thank the NHS Residents applaud NHS staff for all their hard work during the Coronaviroutbreak in Glasgow
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Clap For Our Carers: People across UK thank the NHS Wembley Arch in London is lit up in blue in a gesture of thanks to the hardworking NHS staff
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Clap For Our Carers: People across UK thank the NHS Dr Olivera Potparic Anestesis applauds her colleagues after finishing a 12 hour shift at Chelsea and Westminster Hospital
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Clap For Our Carers: People across UK thank the NHS Residents in a Northampton street applaud in support of the NHS
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Clap For Our Carers: People across UK thank the NHS People applaud infront of big screen in Piccadilly Circus
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Clap For Our Carers: People across UK thank the NHS People applaud the NHS from their balconies and gardens across the road from Wythenshawe Hospital
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Clap For Our Carers: People across UK thank the NHS A police officer joins staff from the Royal Liverpool University Hospital in a national applause for the NHS
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Clap For Our Carers: People across UK thank the NHS The London Eye is pictured lit blue in support of the NHS
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Clap For Our Carers: People across UK thank the NHS People applaud the NHS from their balconies and gardens across the road from Wythenshawe Hospital
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Clap For Our Carers: People across UK thank the NHS NHS workers wave from a window at Chelsea and Westminster Hospital
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Clap For Our Carers: People across UK thank the NHS People applaud the NHS from their balconies and gardens across the road from Wythenshawe Hospital
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Clap For Our Carers: People across UK thank the NHS Redcar Pier lit up in blue
Redcar & Cleveland Borough Council/PA
Clap For Our Carers: People across UK thank the NHS Duchess of Cornwall and the Prince of Wales joining in the national applause for the NHS workers battling coronavirus, coupled with photos from previous visits to NHS facilities
Instagram/clarencehouse/PA
Clap For Our Carers: People across UK thank the NHS People applaud the NHS from their balconies and gardens across the road from Wythenshawe Hospital
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Clap For Our Carers: People across UK thank the NHS A family applaud outside their home during the Clap for our carers campaign in support of the NHS in Newcastle-under-Lyme
Reuters
Clap For Our Carers: People across UK thank the NHS People applaud outside their homes in Parsonage Gardens during the Clap For Our Carers campaign in support of the NHS, as the spread of the coronavirus disease (COVID-19) continues, EnfieldPeople applaud outside their homes in Parsonage Gardens during the Clap For Our Carers campaign in support of the NHS in Enfield
Reuters
Clap For Our Carers: People across UK thank the NHS People show appreciation outside Chelsea and Westminster Hospital
Reuters
Although daytime traffic levels have climbed, they remain below those experienced in the evening peak.
Despite increased demand overall, Virgin Media insists its network has "ample capacity".
Additional reporting by Press Association
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